He still has his wedding photos on his social?

I have been dating this guy for 3 months. He got married in 2019 and I added him on social. He still has all his wedding photos up and also he had his status listed as "open relationship" thing is, they have gotten a divorce. He seems nice and said he wants to move forward with me but is this a red flag?

He still has his wedding photos on his social?
Post Opinion